Re: macro for \once\override

[David Kastrup]

Werner LEMBERG <wl@gnu.org> writes:

>> oo = #(define-music-function (parser location prop value)
>>        (symbol-list? scheme?)
>>         #{ \once \override #prop = #value #})
>> 
>> should likely work fine in 2.18.
>
> Thanks!  Aaron provided this version
>
>   oo = #(define-music-function (parser location prop value)
>          (list? scheme?)
>           #{ \once \override $prop = #value #})
>
> and I wonder which one is better...

Well, I prefer not investing the overhead of $ when # is sufficient, and
I prefer using predicates that are specific enough to lead to error
messages at the place where the wrong input is rather than triggering
followup errors.

Given correct input, they should do the same.

-- 
David Kastrup